You can create your own sounds that WildCard can play.
Get a sound digitizing box from MacNifty and the program SoundCap, also from MacNifty. Record your sounds on a tape recorder. Connect the tape recorder to the MacNifty digitizer and run SoundCap (see its instructions). Choose a sampling ratio of 2 for music or 3 for speech from the Choices menu. Edit your sounds to cut off any extra. (Do not choose Data Compression in the File menu.) Save your sound in a file.
To convert a SoundCap file into a resource (of type 'snd ') for HyperCard, use the HyperTalk command SoundCapToRes.
It takes four arguments: the name you want to call the sound, the file that contains the SoundCap output, the stack in which you want to put the sound, and the base pitch of the sound. Files must be complete path names. The stack cannot be the current stack or home. The base pitches of (60, 72, 79, and 84) are for sample rates of (x1, x2, x3, and x4).